Philips Avent SCF013/47 Natural 9 Ounce Bottle is the most natural way to bottle feed. The Natural bottle design make it easy to combine breast and bottle feeding. The wide breast-shaped nipple with a flexible spiral tip and unique comfort petals make the nipple softer and more flexible to promote natural latch-on. The petals also reinforce the shape of the nipple to prevent it from collapsing in baby’s mouth so your baby can feed contentedly and without interruption. The soft nipple design mimics the feel of the breast. The ergonomic shape makes it comfortable for parents to hold and easy for small fingers to grasp. Assembly is simple, with only a few parts, and the wide bottle neck makes filling and cleaning easy. The Natural bottle is made from polypropylene, a BPA free material, and works with all nipples and caps from the Natural line.